Dr
Masafumi Horio
(University of Zurich)
We have performed soft x-ray angle-resolved photoemission spectroscopy (ARPES) measurements on overdoped La-based cuprates La$_{2-x}$Sr$_x$CuO$_4$ and Eu$_{0.2}$La$_{1.8-x}$Sr$_x$CuO$_4$, and investigated the band structure in three-dimensional momentum space. While nodal part of the Fermi surface was $k_z$ independent, significant $k_z$-dispersion was unveiled in the antinodal portion. From the band structure fitted to the tight-binding model, we have demonstrated that the significant $k_z$ dispersion suppresses the enhancement of the density of states (DOS) by van-Hove singularity (VHS). Our results suggest that the enhancement of electronic specific heat observed in La-based cuprates is caused by quantum criticality rather than by simple DOS divergence at VHS.
Dr
Masafumi Horio
(University of Zurich)
Kevin Hauser
(University of Zurich)
Prof.
Yasmine Sassa
(Chalmers University of Technology)
Zarina Mingazheva
(University of Zurich)
Dr
Denys Sutter
(University of Zurich)
Kevin Kramer
(University of Zürich)
Dr
Ashely Cook
(University of Zurich)
Elisabetta Nocerino
(KTH Royal Institute of Technology)
Ola Forslund
(KTH Royal Institute of Technology)
Prof.
Oscar Tjernberg
(KTH Royal Institute of Technology)
Prof.
Masaki Kobayashi
(Paul Scherrer Institut)
Alla Chikina
(Paul Scherrer Institute)
Niels B. M. Schröter
(Paul Scherrer Institut)
Jonas Krieger
(Paul Scherrer Institut)
Dr
Thorsten Schmitt
(Paul Scherrer Institut)
Dr
Vladmir N. Strocov
(Paul Scherrer Institut)
Dr
Sunseng Pyon
(University of Tokyo)
Dr
Tomohiro Takayama
(University of Tokyo)
Prof.
Hidenori Takagi
(University of Tokyo)
Oliver Lipscombe
(University of Bristol)
Prof.
Stephen Hayden
(University of Bristol)
Dr
Motoyuki Ishikado
(Comprehensive Research Organization for Science and Society)
Dr
Hiroshi Eisaki
(National Institute of Advanced Industrial Science and Technology)
Prof.
Titus Neupert
(Physik-Institut, Universität Zürich)
Prof.
Martin Månsson
(KTH Royal Institute of Technology)
Dr
Christian Matt
(University of Zurich)
Johan Chang
(University of Zurich)
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